The Great Lakes go dry: how one-fifth of the world’s fresh water is dwindling away

The frozen opalescent lake and thin, gray sky fade together into white light where the horizon should be. Tall, skeletal grasses shiver on the beach in a wind that makes any sliver of exposed skin burn. The Arni J. Richter, an icebreaking ferry, is about to pull away from Northport Pier for its second and final trip of the day to Washington Island. It’s loaded with food and fuel for the more than 700 hardy residents who call the remote island, just north of Door County peninsula in Wisconsin, home.